Circular-knitting frame



June 16, 1925. 1,541,809

Ev HAAGA I CIRCULAR KNITTING FRAME Fi; ed June 28, 1920 '5 Sheets-Sheet 1 June 16, 1925- E. HAAGA CIRCULAR KNITTING FRAME 3 Sheets-Sheet 2 Filed Jqne 28, 1920 In venior:

June 16, 1925.

E. HAAGA CIRCULAR KNITTING FRAME .3 sheats=sheet 5 Filed Jgne 28. 1920 Patented June 16, 1925.

tenses EMIL HAAGA, OF STUTTGART,,GERMANY.

cIRcULAaKNr'rTING FRAME.

Application filed June 28, 1920. Serial N0.3F12,4l62.

To all whom i! army concern.

13c it known that I, EMIL HAAGA, a citizen of the German Empire, residing at IStuttgart, Germany, have invented certain new and useful Improvements in Circular- Knitting Frames, for'which I have filed application in Germany- June 19, 1919, of which the following is a specification.

My invention relates to knitting frames and more especially to a frame in which a peculiar position is assigned to the frame needles and wherein the jack sinkers are of a special construction. In the case of the hitherto known types of frames, the needles are lodged in radial millings of the needle carrier, the needles being consequently radially disposedtowards thecentre. In th case of frames working with loop foriniiig devices, so-called loop wheels (inailleuses), such for example as. the French circular .fralne, this aforesaidarrangement involves difiicultiesin so far as the needles of the needle circle and the sinkers of the sinker circleetfect the knocking over operation, in the course of their mutual passage, in an upright position and partly radially inclined towards one another. This is particularly the case when the sinker passes in between the needles-at the so-called point of entryeso that the sinker will be always disposed at its furthest obliquely between two needles in the directiontoward the centre of th needle rim, whereas subsequently it stands fairly straight or is drawn further outward. Now the said oblique, and hence unfavourable position thus created between sinker and needles, causes the unreliable entry of the sinker and the shifting aside of the needles, in other words, the formation of mutually unfavourable relations. Types of excentrics which effect the pro-per passage of the sinkers are obtained only after numerous trials and experiments. In order to obtain an improved entry ofthe sinker, it has been proposed to so dispose the looping axis, i. e. theloop wheel axis, that the sinker when entering into operation will move in a directionparallel to the needle cooperating with it. However, this will render the positions of the wheels and even the conditions under which the loop wheel is set in motion extremely difiicult.

In niy improved structure these difficulties are successfully overcome by the altered position given to the needles, so thatthe point where the sinker enters is shifted into the most favourable posit-ion imaginable relatively to the needle disposed at said point, namely into a parallel position. The needies are accordinglynolonger disposed radially toward the central axis, but are shifted to one side in correspondence with the direction taken. by the jack sinker as it drops into operation, so that the said sinker will always drop in in a line parallel to the position of the needle. The passage, i. e. the subsequent motion executed by the sinker remains: the one hitherto customary,

i. e. forwards and backwards. The point where the sinker passes out of the loops re 79 mains unchanged, and thus,- indeed, re mains as unfavourable as in the case of the known types. of looping wheels; however this fact is of no importance because the sinker in the passing out position is already again withdrawn to such an extent from the centre of the needle axisthat the fact of its being in an inclined position will act far less unfavourably, so that no jamming can possibly arise.

The aforementioned disadvantage of the needles being shifted aside by the sinkers, is prevented in niy improved structure by the provision of a specially shaped sinker. To the end indicated, the sinker-especially that 55 part of it which effects the sinkingis broadened at the said part merely rearwards, toward the top only so much as to lend it sufficient resisting power to enable it tosink the thread, while for the rest the sinker is made 99 so narrow that when in the oblique position instead of displacing the needle, as heretofore, it will simply pass beneath it. Thus, by narrowing. down the rear face ofthe sinker, jamming is prevented by the part which effects the sinking, and this including the nib, con nng to lie underneath a needle.

By. thus giving the possibility of turning the slnker aside and slipping 1t underneath the needle, not only is the heavy working 100 of the sinker, caused by jamming, avoided, but besides this, threads of exceptionally strong quality may be employed because the free space between the needles is exclusively reserved for the thread. I 1

An additional advantage proper to this novel sinker resides in the fact that the shape of the slur no longer depends on the pitch of the frame. Up to the present, for each pitch of the frame a diiferent form of slur had to be used. By employing the novel type of sinker, however, a standard form of slur may be used, as the width of the slur will no longer exert a jamming effect, since the sinker will be able'to move aside and slip under the needle.

Moreover, these two features of the improved frame structure give rise to ,a spe cially novel characteristic, and that is that a cylindrically shaped loop wheel may be employed. Cylindrically shaped loop wheels of this kind could not be made use of up till now, because in a cylindrically shaped loop wheel the sinkers, when assuming an oblique position relatively to the needles, will pass through, still more unfavourably than in the case of a conically shaped loop wheel. The use of a cylindrically shaped loop wheel possesses considerable advantages over and above the conically shaped wheel since it is required in one size and one shape only for all frame sizes, while, on the other hand, the conically shaped loop wheel must be constantly changed to suit each particular size of frame; for which, reason hundreds of different sizes of loop wheels have to be figured out and kept on stock. And not only the loop wheels, with all their accessories, but also all the cams and similar mechanisms cooperating with the loop wheels must in that case be specially made for each particular size of frame. In contradistinction hereto the cylindrically shaped loop wheel embodies great and essential advantages.

In the drawings affixed to this specification and forming part thereof the preferred form of a knitting frame according to the present invention is illustrated.

In the drawings, Figs. 1 to 13 are diagrammatical views showing. the needles and sinkers in different working positions, both according to the known constructions as well as according to the improved structure.

Fig. 1 being a diagram illustrating the relative position of the needles and sinkers according to my invention, while Fig. 2 shows part of the circle of needles and the sinkers cooperating therewith,

Fig. 3 illustrating a modification.

Fig. 4 shows the novel type of sinker employed, and its position relatively to the needle, the nib being arranged underneath the needle.

Fi 5 shows that the sinkers iass com-.

advantages afforded by the novel arrange ment.

Fig. 13 discloses the position of the loop wheel relatively to the frame, and

Figs. 14 and 15 show how the cylindrically shaped loop wheel is to be employed.

Referring to these drawings, Fig. l indicates the new position of the sinkers with reference to the needles. Hitherto the needlcs were all disposed radially toward the centre at of the circle of needles 0. In order to introduce the sinker 7) under favourable conditions as possible at the point 0 between the needles, the axis of the looping device supporting the sinkers was therefore disposed diagonally with reference to the needles, being in addition lodged generally also diagonally to the axis of the frame. In the new arrangement, as shown in Fig. l, the sinkers p are disposed at right angles to the frame axis. The needles n are lodged along the rim 0 in such an manner as to permit them to stand parallel at the pointe to the sinker when it enters the entry being thns disposed in such a manner that their axes form tangents of a similar circle, concentric with the rim 0. It will be. readily understood that this arrangement is apt to secure the most favourable position imaginable of the saidmembers with reternce to each other.

F 2 shows a section of the improved rim of needles together with the Sl11lItl'.. Seeing that the sinker attains its lowermost. position between the needles at the point- (2,

the positionof the sinker at this particular point relatively to the needles, is of prime importance.

However, in order to prevent any jamming or dislodging of the. needles by the sinker as it continues its passage, the sinker may obtain the shapeshown in Fig. 4. As will be observed, the broadening out .of the sinker with a view to increasing its resisting capacity only begins to the rear of the beaker nib a, while in front the sinker is made very narrow. By this arrangement the nib a comes to lie completely underneath the needles, shown in Fig. 4, while hitherto the sinker was disposed down to its front end between the needles. As a consequence, there is left a complete .freespace between the needles during the passage of the sinkersv in the. course of the sinking operation (Fig. 5), which space is exclusively reserved for the thread 7) t Fig. 7) thus giving the possibility of working with particularly strong threads. 6 shows the drawbacks inherent in the type of sinker hitherto employed. In this case the space between the needles is partially filled out by the sinker, so that already when using only medium thread qualities a jamming action is bound. to arise. As hereinbefore explained, the improved sinker enables In opposition hereto Fig.

the nib a to turn aside andsli under. the

needles a, as shown in Figs. 1 an 8,whereby the possibility is given of employing the same looping device for, different frame pitches, whereas up tothe present the shapes of the looping device had to be exactly adaptedto the said pitch, since in case of disagreement the sinkers jammed and dislodged the needles.

In Figs. 12 to 15the said members are shown in various positions in accordance with the improved arrangement to illustrate the advantages resulting during the working, as above explained.

It will be understood that the new type of sinker may also be employed for other kinds of knitting frames, the improved arrangement of the needles not forming a condition hereto. Similarly, the type of sinkers hitherto known may be made use of in connection with the novel arrangement for the needle, provided a cylindrically shaped looping device is employed.

However, the said novel needle arrangement may also be obtained by making use of the custmnary milling of the needle-carrier and bending the needles laterally to make them correspond to the forward protruding section of the needle-carrier (Fig. 3). y

In Fig. 13 there is disclosed the position of the looping device relatively to the frame, while Figs. 14 and 15 show the novel looping device used in connection with two entirely different sizes of frames.

The axis 0 of the looping device is lo rated at right angles to the axis of the frame, centrally to the needle rim, being suspended in bearing-s (Z, d. The sinkers p are supported in a well known manner by the disks f and g, and are disposed in parallel to the axis 0.

In Figs. 14 and 15, there is shown how one and the samelooping device may be employed for various sizes of frames. The looping device itself is in no way altered, but in accordance with the altered size of the frame, the driving mechanism is a different one.

To this end, the driving wheel 72, is interchangeably fixed to the axis 0. On the needle rim is' disposed the gear wheel rim 2', which is guided in its movements by the nib The rim 2' may be raised or lowered by aid of clampin screws Z, and secured in its position by nuts.

In the example illustrated by Fig. 14, the diameter of the frame is assumed to be smaller. A driving wheel h. of small diameter is fixed to the axis a. The transmission of the movement from the frame on to the looping device is effected without any change of position of this latter by shifting the rim. By aid of the screws Z, the rim 2', which is supported by the rib members k may be raised till it enters into engagement with the driving wheel h.

In Fig. 15 the manner of employing the looping device is shown in connection with a frame of larger size. The sole difference is that a driving wheel h, of correspondingly larger diameter is fixed to the axis 0, the rim 2' being accordingly disposed somewhat further below. The looping device itself and the manner of its support remains the same for all sizes, and merely the driving mechanisms must be exchanged, and the rim 2' set to suit the size of the frame or the pitch of the needles employed.

The setting and fixing of the needle rim may be effected in any manner desired- I claim:

1. In a circular knitting frame, a circular needle carrier, a circle of needles horizontally disposed on said carrier in such a manner that their axes form tangents of a small er circle concentri with said carrier and a circle of sinkers disposed at right angles to the frame axis.

2. In a circular knitting frame, a circular needle carrier, a circle of needles horizontally disposed on said carrier in such a manner that their axes form tangents of a smaller circle concentric with said carrier, a cylindrically shaped loop wheel and sinkers disposed thereon at right angles to the frame axis.

In a circulapinntting frame in com bination, a circular rotatable needle carrier,

a cylindrically shaped loop wheel having its axle disposed radially to said needle carrier, sinkers disposed on the circumference of sa1d wheel in parallel with its axis, needles disposed on said carrier in such a manner as to extend substantially in parallel with said sinkers at the first point of intersection of the said circles of needles and sinkers and a driving wheel interchangeably arranged on the loop wheel shaft.

4. In a circular knitting frame in combination, a circular rotatable needle carrier, a cylindrically shaped loop wheel having its axle disposed radially to said needle carricer, sinkers disposed on the circumference of said wheel in parallel with its axis, needles disposed on said carrier in such a manner as to extend substantially in parallel with said sinkers at the first point of intersection of the saidcircles of needles and sinkers, a driving wheel interchangeably arranged on the loop wheel shaft, a gear wheel rim on said needle carrier and means for varying the distance between said rim and said shaft.

5. In a circular knitting frame in combination, a circular rotatable needle carrier, a cylindrically shaped loop wheel having its axle disposed radially to said needle carrier, sinkers disposed on the circumference said wheel in parallel with its axis, needles disposed on said carrier in such a manner as to extend si'ibstantially 1n parallel with said slnl ers at the first point of intersection of the said circles of needles and sinkcrs, a

driving wheel interchangeably arranged on the loop wheel shait, a gear wheel lllll on said needle carrier and vertical screw bolts extending from said carrier upwards and supportingsaid rim.

(3. In a circular knitting 'l ran'ie in co1nbi nation a circular rotatable. needle, carrier, a cylindrieally shaped loop Wheel haringg' its axle disposed radially to said needle earrier, sinkersdisposed on the cireumferenee of said Wheel' invpa-rallel with its axis and needles disposed on said carrier in such a manner as to extend substantially in parallel with said sinker-s at the first point 0*." intersection ot the said circles oi needles and sinlcors, the operativeicmds of said siul'cvrs being narrowed dow-n at the rear face as far as admissible.

-lu testimony Whereotl ailix my signature.

ElrlIL HA A. i {A 

